Answer Posted / palak shah 09879803533

since the waveform of current or voltage is sinosuidal so v
can only generate 3 phase. also if v use 4 phase the 180/4=
45 degree would be distributed and so motor will run for
sometime then stop for sometime and the again run for
sometime....... so ultimately windings will burnt.

thanks
palak shah
09879803533

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